<!DOCTYPE?html>
<html>
<head>
<meta?charset="UTF-8">
<title>獲取classname</title>
</head>
<script?type="text/javascript">
window.onload=function(){
????????
function?getClassName(oParent,sClass){
var?aEle=oParent.getElementsByTagName('*');
?????????????var?aResult=[];
?????????????for?(var?i?=?0;?i?<?aEle.length;?i++)?{
??????????????if(aEle[i].className=sClass){
??????????????aResult.push(aEle[i]);
??????????????}
?????????????}
?????????????return?aResult;
}
alert("a");
var?oUl=document.getElementsByTagName("ul");
var?oli=getClassName(oUl,"main");
}
</script>
<body>
<ul?id="name">
????<li>1</li>
????<li>2</li>
????<li>3</li>
????<li>4</li>
</ul>
</body>
</html>就是var?oUl=document.getElementsByTagName("ul");li的父元素ul只能通過Id獲取，不能通過tagname獲取，否則就報錯
封裝getByClass函數，獲取父元素我用getElementsByTagName就報錯，但是用Id獲取就不會，請問是哪出了問題
菩提愛吃梨
2016-02-27 11:58:59
